It's dead... mechanical diode, clutches, drum - Ford Powerstroke Diesel Forum
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Old 05-20-2014, 07:05 PM
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It's dead... mechanical diode, clutches, drum

The transmission ate itself at 227,000 miles.

Started randomly downshifting at very inappropriate times. Like from 3rd to 1st - felt like you were hard braking, would downshift at 35mph and then upshift back up at 20mph.

Only 5,000 miles after a fluid flush and filter change - might have been what did it, who knows...

Funny thing, this is the second trans, has factory reman markings on it per the trans shop.

And it has the mechanical diode.... so that is an extra $200+ to replace.

$1695 for the basic rebuild with new converter
$395 for tow/haul/performance upgrades
$200-300 to replace the MD and the drum it tried to eat

The local shop seems to have a lot of experience with these and he didn't seem like a BS'er. Just a guy that knows transmissions inside and out.

Only need to get 250,000 miles on this one, so this level should be fine. By then, the truck should be completely falling apart...
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Old 05-20-2014, 08:28 PM
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doesnt sound too bad.
drop the pan and change the filter every 30k miles and just add back in the 7-8 quarts you lost.

as long as you trust the guy and he seems left sounds fine.
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